Well, someone needs their glasses checked, seeing as how the 2nd Amendment states two things:
1 - Militias can be formed if necessary for the state's protection
2 - The people have the right to bear and keep arms
Neither of these rights can be infringed upon. That's what the damned Amendment says. Only a simpleton would read that document as "militias maintain the right to bear arms, not civilians".
Should certain weapons be military or police only? Absolutely. That's why they created civilian versions of them (like the AR-15 is a civilian version of the M-16). Can stricter gun laws (and most likely will) come out of this event? Absolutely. As long as we still maintain the rights to buy weapons (even if it's something ridiculous like once a month), I could give less of a shit. Was there any reason for this kid to purchase a semi-automatic rifle? Not in the least bit. But don't restrict access just because of the unfortunate events. It was the acts of a lunatic that managed to keep a smile going that killed those people, not his ability to buy a semi-auto or a glock.
About the gun control laws, I'm saying by tightening them that not only checking for any criminal records, they should (eg. police stations) make periodic mental tests just to check the person's sanity. Also, at first people should pass a special test to apply for a gun license and the police (who gives decides whetever to give a license or not) should have the rights to have/check all information about the person's health information, medical records etc. Not the gun shops but the authority. And this guy was healthy individual? RIGHT. UMM, NOT. No one who is healthy from the head doesn't go to a movie screening with very powerful weapons, start shooting randomly people (children and a 3-month-old baby), get bombs and boobytrap his whole flat. I'm not saying that very strict gun laws will prevent these massacres 100% but it still will prevent a lot of these from happening. People who are not healthy individuals usually seems like they are perfectly healthy individuals, but when you look deeper to them and get to know them they are not. That's why the periodic tests (not the ridiculous ones over the internet) should help too. Of course there are the ways to get illegal guns but they are not as easy to get as someone would think, if you don't know the right people, etc. Also, they cost much more than legally way bought gun. Because if these massacres keep happening with the loose gun laws, authorities will be having frisk searches and metal detectors before entering movie theaters, shopping malls, etc. That's just my guess but it sure looks like it will happen if these massacres keep happening too. We did tighten our gun control laws after two massacres. It's sad it took two massacres to get people react. What's more saddening is that, it always takes something awful to happen make people even react.
Mourning is ok. Everyone should take the time they feel they have to. Talking about it, helps a lot and that's why usually people talk about it when something shocking / awful happens.
Come to New York, they pretty much have the strictest gun laws in the country (to the point that you have to carry your pistol license with you at all times, even if the gun itself is tucked away at home in pieces under your bed in a case, which it also needs to be when not in use).